Abstract: A ceiling suspension system comprises a flexible panel, a first support structure and a plurality of elongate support members, wherein each elongate support member comprises a first end and a second end. The first end of each elongate support member is coupled to the first support structure and the second end of each elongate support member is coupled to the flexible panel. The coupling between the elongate support members and the flexible panel is arranged to force the flexible panel into a desired shape.

Abstract: A luminous panel includes a light-emitting board having a light-emitting face to form a surface of a wall device, and a receiving part to be fastened to a framing of the wall device. The light-emitting board is removably attachable to the receiving part. In the installed configuration, the emitting face forms a part of the surface of the wall device and the receiving part is at the rear of the surface of the wall device. The light-emitting board and the receiving part include complementary rotational members located near first ends of the light-emitting board and the receiving part, and complementary snap-fastening members located near second ends of the light-emitting board and the receiving part. In the assembled state, the receiving part is completely covered by the light-emitting board and the rotational members are housed in the volume between the light-emitting board and the receiving part.